It carries UL864 and UL916 listings

and circulator pumps

it is engineered for seamless integration into existing liquid lines

serving as the direct replacement for Y66T13-0

Zonefirst ZDB-10X12 10HX12W Parallel 24V 2-Pos S/R Refrigerant It carries UL864 and UL916The Zonefirst ZDB 10X12 is a professional grade parallel blade zone damper engineered for precise airflow management in residential and commercial 24V zoning systems. This 10HX12W bottom mount damper features a heavy duty extruded aluminum frame and 3 inch parallel blades, ensuring minimal static pressure drop while maintaining a rigid structure across the duct opening. Driven by a 24V spring return motor, the unit is factory configured for power